用“输出比较+脉冲累加器”测风扇的转速，将转速在数码管上显示；忘指出错误，谢谢！

伤痕我心 · 发表于 2013-8-31 18:44:20

#include <hidef.h>    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions */
//***********************
//输入信号的频率测量*****  利用脉冲累加器在单位时间内对脉冲计数，用输出比较来定时
//***********************
unsigned int  m = 0,a=0,n=0;
const byte LedData[18] = {0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6,0xee,0x3e,0x9c,0x7a,0x9e,0x8e,0xce,0x6e} ;
/*                         0 1 2 3 4 5 6 7 8 9 A B C D E F P H          */
const byte Error[5] = {0xee,0xfc,0xee,0xee,0x9e};

void spiDELAY(void)
{
unsigned int loop_i;

for (loop_i=0; loop_i< 50; loop_i++)
{
      ;
}
}

void spiWRITEbyte(unsigned int spiDATA){
   unsigned  int i =0;

   for(i;i<8;i++){

      PTP_PTP2 =0;
      spiDELAY();
      if(spiDATA%2){
            PTP_PTP1=1;
      }
      else {
         PTP_PTP1=0;
      }
      spiDELAY();
      spiDATA = spiDATA/2;
      PTP_PTP2 = 1;
      spiDELAY();
   }
      PTP_PTP2 = 1;
}

void ledCONTROL(dword displayDATA){
   unsigned int  spiBYTE01,spiBYTE02,spiBYTE03,spiBYTE04,spiBYTE05;
   spiBYTE05 = displayDATA /10000                         ; //得到万位
   spiBYTE04 = displayDATA /1000 - displayDATA /10000 *10  ; //获得千位
   spiBYTE03 = displayDATA /100 - displayDATA /1000 *10 ; //获得百位
   spiBYTE02 = displayDATA /10 - displayDATA /100 *10    ; //获得个位
   spiBYTE01 = displayDATA % 10                         ; //获得个位

// spiWRITEbyte(spiDATA);
spiWRITEbyte(LedData[spiBYTE01]);
spiWRITEbyte(LedData[spiBYTE02]);
spiWRITEbyte(LedData[spiBYTE03]);
spiWRITEbyte(LedData[spiBYTE04]);
spiWRITEbyte(LedData[spiBYTE05]);
}

void PLL_Init(void)
{
REFDV=0;
SYNR=4;
while(!(CRGFLG && 0x08));
CLKSEL=0x80;    //****20MHZ
}

void ECT0_Init(void)
  { //***设置输出比较
TIOS=0x01;
TC0=0xFE;

TCTL1=0x00;

//  OC7M = 0xFE;
TCTL2=0x02;
TSCR2=0x06;
TSCR1=0x80;
TIE=0x01;
   //***脉冲累加器的设置
PACTL = 0x50;

}
/* static void IOC_Init(void)
{
PACTL=0x50;//PT7 PIN,PACN32 16BIT,FALLing edge,NOT INTERRUPT
// PACNT = 0x00;
TCTL3=0xc0;//c-输入捕捉7任何沿有效,
TCTL4=0xc0;//40表示ICx禁止, 1表示上升沿, 2表示下降沿, 3表示任何沿
TIE  =0x00;//每一位对应相应通道中断允许,0表示禁止中断
TIOS =0x00;//每一位对应通道的: 0输入捕捉,1输出比较
TCTL3_EDG7x=1;//c-输入捕捉7任何沿有效,
}
*/
void PWM_Init(void)
{
PWMPOL = 0X20;
PWMCAE = 0X20;
PWMCLK = 0X20;
PWMPRCLK = 0X00;
PWMSCLA = 0X80;
PWMCTL = 0X00;
PWMPER5 = 128;
PWMDTY5 = 30;
PWME = 0X20;
}

void main(void) {
  /* put your own code here */
unsigned char i,spiDATA,spiLENGTH;

DDRP_DDRP1 =1;
DDRP_DDRP2 =1;
DDRK_BIT1 =1;
PORTK_BIT1 =1;
PTP_PTP1 =0;
PTP_PTP2 =0;

PTT_PTT0 =1;
spiDATA = 0XFC;
spiLENGTH = 8;

for(i=0;i<6;i++)
{

   spiWRITEbyte(spiDATA);
}
  PLL_Init();
//  IOC_Init();
  ECT0_Init();
  PWM_Init();

EnableInterrupts;

  for(;;) {
_FEED_COP(); /* feeds the dog */
  } /* loop forever */
  /* please make sure that you never leave main */
}

#pragma CODE_SEG NON_BANKED
void interrupt 8 timer0_ISR(void)
{
TFLG1_C0F=1;
m=TCNT;
TC0=m+15625 ;  //定时50ms
n++;
if(n==20) //1s
{
   a=PACN32;
   PAFLG_PAOVF = 1 ;

   a = a/334;
   ledCONTROL(1000);
//  PACN32 = 0x00;
   n=0;
}

}

#pragma CODE_SEG DEFAULF